CN103774537B - A kind of asphalt pavement regeneration method - Google Patents
A kind of asphalt pavement regeneration method Download PDFInfo
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- CN103774537B CN103774537B CN201210411162.5A CN201210411162A CN103774537B CN 103774537 B CN103774537 B CN 103774537B CN 201210411162 A CN201210411162 A CN 201210411162A CN 103774537 B CN103774537 B CN 103774537B
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Abstract
The invention discloses a kind of asphalt pavement regeneration method, comprise following content: (1) carries out milling fragmentation to old flexible pavement, and old pavement material is recycled to asphalt tank, heating, stirs; (2) in the mixture of step (1), add inorganic binder and organic additive, stir; (3) bitumen regenerant added in the mixture of step (2) and hot-melt asphalt, stir, namely obtain reclaimed asphalt mixture; (4) paved by reclaimed asphalt mixture, compacting, namely completes the regeneration process of flexible pavement.The method technique is simple, and favorable regeneration effect, cost is low, is applicable to commercial Application.The inventive method has wide prospect in asphalt pavement regeneration field.
Description
Technical field
The present invention relates to a kind of asphalt pavement regeneration method.
Background technology
At present, the high-grade highway of China more than 90% all adopts semi-rigid material as Asphalt Pavement Base and subbase when building.According to the projected life (15 ~ 20 years) of flexible pavement, many highways that China has built at present will enter successively repairs the maintenance stage, if take traditional method, a large amount of waste asphalt mixtures milling got off are discarded, causing environment pollution on the one hand, is the significant wastage to resource on the other hand.The regeneration techniques of flexible pavement be by old asphalt pavement through digging, reclaiming, after broken, screening, again mix and stir into compound by a certain percentage with regenerative agent, new bituminous material, new mineral aggregate etc., enable satisfied certain pavement performance and by a set of technology of its surfacing again.The regeneration techniques of flexible pavement comprises cold in-plant recycling, on-the-spot cold regeneration, hot in-plant reclaimed and on-site heat regeneration technology.Wherein road surface hot in-place recycling can ensure the pavement performance that regenerated road surface is higher; Road surface cold recycling technology is as a green environmental protection technique, but shortcoming controls construction quality difficulty greatly, generally needs Laying Asphalt Surface Course to do overlay treatment.
CN1580130A discloses a kind of regenerant for waste asphalt, comprises lightweight oil content, resin, age resistor and uvioresistant auxiliary agent etc.This regenerant for waste asphalt can make aging useless pitch reach protobitumen technical requirement after regeneration, but lightweight oil content in this regenerative agent is volatile, less stable, and does not wherein relate to the performance impact of regenerative agent to reclaimed asphalt mixture.
CN101845227A discloses a kind of plain asphalt reclaiming agent and Synthesis and applications thereof.This regenerative agent is by matrix pitch, reclaimed oil, plasticizing agent and high-temperature stabiliser through being heated to 110 DEG C ~ 135 DEG C, obtained after mixing, stirring.First aged asphalt is heated during application, then add obtained plain asphalt reclaiming agent wherein, then add thermal agitation and obtain regeneration asphalt.This plain asphalt reclaiming agent can make aged asphalt play good regeneration effect, but be thick liquid under this regenerative agent normal temperature, and addition is more than 30%, add the difficulty of situ regeneration process, and this invention does not relate to the regeneration effect of regenerative agent to aged asphalt compound.
CN1757828A discloses a kind of method realizing asphalt field cold renewal by adding foamed asphalt, the method in independent asphalt tank, first utilizes high temperature hot-melt asphalt to add blowing agent prepare foamed asphalt, first compound is recycled to mixing drum when constructing, interpolation cement and compound are mixed together, and the foamed asphalt finally spraying previously preparation also stirs and evenly mixs.The method can complete the regeneration of flexible pavement effectively, but need with conduction oil, the asphalt tank of 5t to be heated in work progress, utilize high temperature hot melt asphalt production to go out foamed asphalt, then complete the regeneration of flexible pavement, increase heat requirement and the operation easier of site operation unit.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of asphalt pavement regeneration method, the method technique is simple, and favorable regeneration effect, cost is low, is applicable to commercial Application.
Asphalt pavement regeneration method of the present invention, comprises following content: (1) carries out milling fragmentation to old flexible pavement, and old pavement material is recycled to asphalt tank, and heating, stirs; (2) in the mixture of step (1), add inorganic binder and organic additive, stir; (3) bitumen regenerant added in the mixture of step (2) and hot-melt asphalt, stir, namely obtain reclaimed asphalt mixture; (4) paved by reclaimed asphalt mixture, compacting, namely completes the regeneration process of flexible pavement.
In the inventive method, the heating-up temperature of step (1) is 130 ~ 170 DEG C.
In the inventive method, the whipping temp of step (3) is 110 ~ 150 DEG C.
In the inventive method, inorganic binder is one or more in building stones, quartz sand, zeolite powder, activated bauxite, ceramsite sand, calcium carbonate sand, breeze, cement, Machine-made Sand, flyash, sodium silicoaluminate, activated alumina, vermiculite, slaked lime, swell soil or active carbon.Wherein the granularity of building stones is 10 ~ 30mm, and the granularity of quartz sand, zeolite powder, activated bauxite, ceramsite sand, calcium carbonate sand, breeze, cement, Machine-made Sand, flyash, sodium silicoaluminate, activated alumina, vermiculite, slaked lime, swell soil or active carbon is less than 3mm.
In the inventive method, organic additive is one or more in ethyl diazoacetate, alkyl alcohol ether carboxylic acid sodium, Celogen Az, N, N-dinitrosopentamethlyene tetramine and azodiisobutyronitrile; Wherein the structural formula of alkyl alcohol ether carboxylic acid sodium is R(OCH
2cH
2)
noCH
2cOONa, R are C
12~ C
18alkyl, n=3 ~ 9.
In the inventive method, described pitch is bi tumenf orr oad, as road asphalts such as No. 70, No. 90 and No. 110.
In the inventive method, be benchmark by reclaimed asphalt mixture quality, add the old bitumen pavement material of 45% ~ 98.6%, the inorganic binder of 0.5% ~ 20%, the organic additive of 0.5% ~ 20%, the bitumen regenerant of 0.2% ~ 10%, the hot-melt asphalt of 0.2% ~ 5%.
In the inventive method, bitumen regenerant comprises with parts by weight: Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium (DMSS) 0.2 ~ 10 part, AEO sulfosuccinic acid monoesters disodium (MES) 0.5 ~ 10 part, acid 0.1 ~ 3 part, 77 ~ 100 parts, water.
In the inventive method, the structural formula of described Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium is RCONHCH
2cH
2oCOCHCH (SO
3na) COONa, wherein R is C
12~ C
15alkyl.
In the inventive method, the structural formula of described AEO sulfosuccinic acid monoesters disodium is RO (CH
2cH
2o)
3cOCH
2cH (SO
3na) COONa, wherein R is C
12~ C
14alkyl.
In the inventive method, described acid is C
1~ C
6organic monoacid or inorganic weak acid, organic monoacid be selected from formic acid, acetic acid, propionic acid, oxalic acid and tartaric acid one or more, inorganic weak acid be selected from silicic acid, carbonic acid and boric acid one or more.
In the inventive method, can need to add other additive according to practical application, as antistripping agent, age resister and polymer modifiers etc. in bitumen regenerant.
The preparation method of bitumen regenerant of the present invention is: by proportioning, Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium, AEO sulfosuccinic acid monoesters disodium and water are added container, stirring is warming up to 70 ~ 90 DEG C, add acid, constant temperature stirs, 0.5 ~ 2 hour, obtain bitumen regenerant of the present invention.
In the inventive method, inorganic binder has stronger adsorptivity, has both supplemented the disappearance of corresponding granularity building stones in old pavement material, has increased the adhesion of pitch and building stones simultaneously.In the bitumen regenerant that the inventive method uses, the compatibility of DMSS and MES and good dispersion, act synergistically with organic additive, fully blend with aging pitch, the asphaltene dissolution that cohesion is got up and be dispersed in oil content, reduce the viscosity of Bituminous concrete surface, regulate the colloform texture of pitch, improve its rheological equationm of state, pitch is made to change soft moulding state into from crisp hard state, fully can disperse under mechanical force and hot effect, with new pitch and the Homogeneous phase mixing that newly gathers materials, improve and improve the performance of reclaimed asphalt mixture.In the inventive method, adding of bitumen regenerant, reduce mix temperature, decrease the generation of pernicious gas, saved energy consumption.In the inventive method, raw materials used easy collection, cost of production is low, good stability, to environment and human body excitant little, be easy to commercial Application.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but therefore do not limit the present invention.
Embodiment 1
By Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium, (R is C
15) 0.5 part, (R is C to AEO sulfosuccinic acid monoesters disodium
14) 8.5 parts and 90.8 parts, water adds container, stir and be warming up to 72 DEG C, add 0.2 part, formic acid, constant temperature stirs 0.5 hour, obtains bitumen regenerant.
Milling fragmentation is carried out to old flexible pavement, old bitumen pavement material is recycled to asphalt tank, be heated to 150 DEG C, stir.Be benchmark by reclaimed asphalt mixture quality, the building stones (granularity is 10 ~ 30mm) of 10%, cement (granularity is less than 3mm), the ethyl diazoacetate of 0.6%, the Celogen Az of 0.5% of 7% is added in asphalt tank, stir, the bitumen regenerant of 8.5%, the hot-melt asphalt of 4.5% is added in the mode of spraying in asphalt tank, fully stir at 115 DEG C, namely obtain reclaimed asphalt mixture.
Embodiment 2
By Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium, (R is C
12) 5.5 parts, (R is C to AEO sulfosuccinic acid monoesters disodium
12) 4.5 parts and 89.1 parts, water adds container, stir and be warming up to 80 DEG C, add acetic acid 0.9 part, constant temperature stirs 1 hour, obtains bitumen regenerant.
Milling fragmentation is carried out to old flexible pavement, old bitumen pavement material is recycled to asphalt tank, be heated to 155 DEG C, stir.Be benchmark by reclaimed asphalt mixture quality, add in asphalt tank the building stones (granularity is 10 ~ 30mm) of 5%, 7% Machine-made Sand (granularity is less than 3mm), 5% Celogen Az, 1% alkyl alcohol ether carboxylic acid sodium (R is 14, n=8), stir, the bitumen regenerant of 5.5%, the hot-melt asphalt of 3% is added in the mode of spraying in asphalt tank, fully stir at 125 DEG C, namely obtain reclaimed asphalt mixture.
Embodiment 3
By Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium, (R is C
14) 9 parts, (R is C to AEO sulfosuccinic acid monoesters disodium
13) 0.7 part and 87.9 parts, water adds container, stir and be warming up to 85 DEG C, add boric acid 2.4 parts, constant temperature stirs 1.5 hours, obtains bitumen regenerant.
Milling fragmentation is carried out to old flexible pavement, old bitumen pavement material is recycled to asphalt tank, be heated to 160 DEG C, uniform stirring.Be benchmark by reclaimed asphalt mixture quality, add in asphalt tank the cement (granularity is less than 3mm) of 2%, 3.5% building stones (granularity is 10 ~ 30mm), 5% alkyl alcohol ether carboxylic acid sodium (R is 16, n=6), the azodiisobutyronitrile of 8.5%, stir, the bitumen regenerant of 3%, the hot-melt asphalt of 2% is added in the mode of spraying in asphalt tank, fully stir at 135 DEG C, namely obtain reclaimed asphalt mixture.
Embodiment 4
By Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium, (R is C
12) 7.5 parts, (R is C to AEO sulfosuccinic acid monoesters disodium
15) 6.5 parts and 84 parts, water adds container, stir and be warming up to 89 DEG C, add propionic acid 2 parts, constant temperature stirs 1.5 hours, obtains bitumen regenerant.
Milling fragmentation is carried out to old flexible pavement, old bitumen pavement material is recycled to asphalt tank, be heated to 165 DEG C, stir.Be benchmark by reclaimed asphalt mixture quality, the building stones (granularity is 10 ~ 30mm) of 0.5%, breeze (granularity is less than 3mm), the cement (granularity is less than 3mm) of 0.5%, the ethyl diazoacetate of 5% of 0.5% is added in asphalt tank, the Celogen Az of 3.5%, (R is 12 to the alkyl alcohol ether carboxylic acid sodium of 6.5%, n=9), the N of 2%, N-dinitrosopentamethlyene tetramine, stir, the bitumen regenerant of 0.5%, the hot-melt asphalt of 0.5% is added in the mode of spraying in asphalt tank, fully stir at 145 DEG C, namely obtain reclaimed asphalt mixture.
This test adopts 90A pitch, and reclaimed asphalt mixture is pumped to the groove that paves and paves, the shaping rear use rubber tyred roller that paves carries out first pressing, and steel roller carries out final pressure, can complete the regeneration process on road surface.
The four kinds of reclaimed asphalt mixtures obtained in embodiment 1,2,3,4, in table 1, are made marshal piece, are carried out performance test, the results are shown in Table 2 to regenerating mixture by the grating of old bitumen pavement material and regenerating mixture respectively.
The grating of table 1 old bitumen pavement material and regenerating mixture.
| Sieve aperture, mm | 26.5 | 19 | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| By quality percentage, % | ||||||||||||
| Old material | 100 | 96.7 | 94.0 | 86.8 | 71.6 | 42.6 | 19.5 | 9.3 | 5.4 | 2.3 | 1.3 | 0.8 |
| Embodiment 1 | 100 | 95.4 | 92.8 | 84.0 | 72.6 | 53.7 | 42.0 | 32.7 | 25.9 | 22.5 | 14.9 | 13.0 |
| Embodiment 2 | 100 | 94.3 | 92.6 | 83.7 | 73.1 | 53.0 | 42.3 | 31.7 | 26.0 | 20.6 | 13.6 | 12.3 |
| Embodiment 3 | 100 | 95.0 | 92.0 | 83.5 | 72.0 | 52.4 | 39.5 | 30.2 | 24.4 | 18.0 | 13.0 | 8.4 |
| Embodiment 4 | 100 | 94.6 | 93.2 | 84.6 | 73.5 | 51.8 | 37.6 | 29.9 | 24.8 | 17.5 | 12.3 | 7.6 |
Table 2 regenerating mixture the performance test results.
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Technical requirements | Test method |
| Stability, kN | 6.83 | 6.77 | 6.45 | 6.39 | ＞5 | T0709 |
| Residual stability ratio, % | 84.5 | 83.6 | 82.8 | 82.0 | ＞75 | T0709 |
| Retained strength ratio, % | 83.6 | 81.2 | 80.3 | 79.8 | ＞70 | T0729 |
Data as can be seen from table 2, the stability of regenerating mixture, residual stability ratio and retained strength all meet technical requirements than index.
Claims (11)
1. an asphalt pavement regeneration method, is characterized in that comprising following content: (1) carries out milling fragmentation to old flexible pavement, and old pavement material is recycled to asphalt tank, and heating, stirs; (2) in the mixture of step (1), add inorganic binder and organic additive, stir; (3) bitumen regenerant added in the mixture of step (2) and hot-melt asphalt, stir, namely obtain reclaimed asphalt mixture; (4) paved by reclaimed asphalt mixture, compacting, namely completes the regeneration process of flexible pavement; Bitumen regenerant comprises with parts by weight: Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium 0.2 ~ 10 part, AEO sulfosuccinic acid monoesters disodium 0.5 ~ 10 part, acid 0.1 ~ 3 part, 77 ~ 100 parts, water; Described acid is C
1~ C
6organic monoacid or inorganic weak acid, organic monoacid be selected from formic acid, acetic acid, propionic acid, oxalic acid and tartaric acid one or more, inorganic weak acid be selected from silicic acid, carbonic acid and boric acid one or more.
2. in accordance with the method for claim 1, it is characterized in that: the heating-up temperature of step (1) is 130 ~ 170 DEG C.
3. in accordance with the method for claim 1, it is characterized in that: the whipping temp of step (3) is 110 ~ 150 DEG C.
4. in accordance with the method for claim 1, it is characterized in that: described inorganic binder is one or more in building stones, quartz sand, zeolite powder, activated bauxite, ceramsite sand, calcium carbonate sand, breeze, cement, Machine-made Sand, flyash, sodium silicoaluminate, activated alumina, vermiculite, slaked lime, swell soil or active carbon.
5. in accordance with the method for claim 4, it is characterized in that: the granularity of described building stones is 10 ~ 30mm; The granularity of quartz sand, zeolite powder, activated bauxite, ceramsite sand, calcium carbonate sand, breeze, cement, Machine-made Sand, flyash, sodium silicoaluminate, activated alumina, vermiculite, slaked lime, swell soil or active carbon is less than 3mm.
6. in accordance with the method for claim 1, it is characterized in that: described organic additive is one or more in ethyl diazoacetate, alkyl alcohol ether carboxylic acid sodium, Celogen Az, N, N-dinitrosopentamethlyene tetramine and azodiisobutyronitrile.
7. in accordance with the method for claim 6, it is characterized in that: the structural formula of alkyl alcohol ether carboxylic acid sodium is R(OCH
2cH
2)
noCH
2cOONa, R are C
12~ C
18alkyl, n=3 ~ 9.
8. in accordance with the method for claim 1, it is characterized in that: described hot-melt asphalt is bi tumenf orr oad, be selected from one or more in No. 70, No. 90 and No. 110 road asphalts.
9. in accordance with the method for claim 1, it is characterized in that: be benchmark by reclaimed asphalt mixture quality, add the old bitumen pavement material of 45% ~ 98.6%, the inorganic binder of 0.5% ~ 20%, the organic additive of 0.5% ~ 20%, the bitumen regenerant of 0.2% ~ 10%, the hot-melt asphalt of 0.2% ~ 5%.
10. in accordance with the method for claim 1, it is characterized in that: the structural formula of described Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium is RCONHCH
2cH
2oCOCHCH (SO
3na) COONa, wherein R is C
12~ C
15alkyl; The structural formula of described AEO sulfosuccinic acid monoesters disodium is RO (CH
2cH
2o)
3cOCH
2cH (SO
3na) COONa, wherein R is C
12~ C
14alkyl.
11. in accordance with the method for claim 1, it is characterized in that: the preparation method of bitumen regenerant, comprise following content: by proportioning, Coconut Fatty Acid Monoethanolamide sulfosuccinic acid monoesters disodium, AEO sulfosuccinic acid monoesters disodium and water are added container, stirring is warming up to 70 ~ 90 DEG C, add acid, constant temperature stirs, and 0.5 ~ 2 hour, obtains bitumen regenerant.
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| CN104250446A (en) * | 2014-09-24 | 2014-12-31 | 北京中杰伟业科技发展有限公司 | Warm asphalt modifier and preparation method and application thereof |
| CN105130280B (en) * | 2015-08-19 | 2018-04-03 | 东南大学 | A kind of rubber-asphalt mixture |
| CN105821733A (en) * | 2016-03-21 | 2016-08-03 | 北京奥润开元环保科技研究院有限公司 | Regeneration technology for asphalt concrete pavement |
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| CN105967565A (en) * | 2016-05-10 | 2016-09-28 | 黑龙江省中信路桥材料有限公司 | Recycled asphalt concrete containing cement and usage method thereof in repair of small roads |
| CN107366211A (en) * | 2017-09-06 | 2017-11-21 | 东南大学 | A kind of bituminous concrete in-situ heat regeneration is layered heating in reciprocating mode technique |
| CN110080073B (en) * | 2019-04-29 | 2021-03-23 | 江苏路通路桥工程集团有限公司 | Regeneration method adopting multistage asphalt pavement in-situ heat regeneration equipment |
| CN110982290B (en) * | 2019-12-20 | 2021-08-24 | 河南交通职业技术学院 | Aged asphalt regenerant and preparation method thereof |
| CN111851225B (en) * | 2020-07-06 | 2021-12-21 | 中电建路桥集团有限公司 | Construction method for regenerating old asphalt pavement |
| CN112300585B (en) * | 2020-11-05 | 2022-07-01 | 广东宏骏建筑工程有限公司 | Asphalt pavement regeneration method |
| CN113403922A (en) * | 2021-07-06 | 2021-09-17 | 浙江春天建设有限公司 | Construction method and construction equipment for in-situ cold regeneration of road macadam base |
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